Phthalocyanine macrocycle as stabilizer for gold and silver nanoparticles

• Published in: Mikrochimica acta (1966) Vol. 167; no. 1-2; pp. 97 - 102
• Main Authors: Lokesh, Koodlur Sannegowda, Narayanan, Venkata, Sampath, Srinivasan
• Format: Journal Article
• Language: English
• Published: Vienna Vienna : Springer Vienna 01-11-2009; Springer Vienna; Springer
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Exact sciences and technology; Microengineering; Nanochemistry; Nanotechnology; Original Paper; Spectrometric and optical methods; Fluorescence; Gold nanoparticles; Silver nanoparticles; Surface enhanced Raman spectroscopy; Tetraminocobaltphthalocyanine; Scanning electron microscopy; Gold; Nanoparticle; Fluorescence spectrometry; Macrocycle; Infrared spectrometry; Silver; Phthalocyanine; Absorption spectrometry; Transmission electron microscopy; Surface Enhanced Raman Spectrometry; Raman spectrometry
• ISSN: 0026-3672; 1436-5073
• DOI: 10.1007/s00604-009-0226-3

A one-step process was used for the preparation of gold and silver nanoparticles stabilized by an aminophthalocyanine macrocycle. The resultant nanoparticles were characterized by absorption spectra, infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. The nanoparticles were found to possess relatively narrow size distribution. The gold nanoparticles have an average diameter of ~2 nm, while silver particles have 4-5 nm. Preliminary studies on fluorescence and surface enhanced Raman spectroscopy were carried out using these nanoparticles. Fluorescence studies indicate that gold nanoparticles do not quench the fluorescence, while silver nanoparticles do. The stabilized nanoparticles showed enhancement of the Raman signals, thus revealing that they are good substrates for surface enhanced Raman scattering studies.